release v0.6.4

[btspoony]

Generated by the Release prep workflow.

Merging this PR publishes dsh-llm-fallbacks@v0.6.4 to npm (--provenance; Trusted Publishing OIDC, tokenless), tags v0.6.4, and creates the GitHub Release.

Changelog

[0.6.4] - 2026-09-28

Changed

• Disclosure chevrons on the Fallbacks card now point right when collapsed and down when expanded (advanced options and the time-slot, role and persona row disclosures).
• The role automatch checkbox moved inline-left of its label with the whole text row clickable — it had slipped below the text inside the collapsed-options body.
• Section headings (main agent / subagents / advanced options) are enlarged to 16px.
• Upgrade @deepseek-ai/dsh-* peer dependencies to ^0.2.0-rc.1 (corridor dsh-v0.1.7-rc.2 → dsh-v0.2.0-rc.1) and refresh the lockfile, pnpm-workspace exemptions/patches, docs pins, and README dsh badge for the new cohort.